Electric paper-perforator.



WITNESSES i r INVENTOR gnaw (7. .f o/sir Q0 1 1 v Au /[quay v Patented Feb. 18, 1913. I

UNITED STATES PATENT. OFFICE.

WIIQLIIAM J. Kos'rnn,

0F PETERBORO, ONTARIO, CANADA, nss ronon or ONE-HALF To RALPH Ci BRAUND, OF'PETERBORO, ONTARIO, CANADA.

ELECTRIC rArnn-rnnronaron.

Specification of Letters Patent.

r tenteureb. 18,1913.

Application filed May 25, 1912. Serial No. 699,727.

of an efficient electro-magnetic perforator,

which may be conveyed from place to place,

and efliciently operate upon a sheet of 'pa perfor facilitating the tearing of the paper according to the desire, of the operator..

Another object of this i vention is the production of a simple and eflicient device which is so formed as to accommodate a small amount of space, and which may effectively operate upon a sheet of paper for allowing the same to be perforated.

Withthese and other objects in View this invention consists of certain novel constructions, combinations, and arrangements of .parts as will be hereinafter-fully described and claimed.

In the drawings :''Figure'l is a central horizontal section taken through the casing showing the operatingmechanism in top plan. Fig. 2 8 a central vertical section taken through the casing. Fig. 3 is' a detailed perspective of the conducting bracket which overhangs the electro-magnets and supports the perforating arm. Fig. 4 is a detailed perspective of the insulating bracket which supports the conducting bracket illustrated in Fig. '3. i

By referring to the drawings by numerals, it will be seen that the device consists in a casing 1 in which casing is carried a plurality of 'electro-magnetic induction coils 2 supported upon an insulated base3. An insulated bracket 4 is carried by one of the electro-magne'ts 2 and projects to the rear.

' thereof, and is provided with an 'angle end 5, which angle end supports a vibrating conducting member 6 This conducting member 6 projects from the angle end 5, and engages the rear end of the perforating arni 7 which arm is insulated from the conducting member 6. The perforating arm 7 is'provided with a downwardly extending point retaining portion 8, which carries a perforating point 9 adjust-ably held in engagement with the downwardly extending poftion 8, by means of a thumb screw 10.

A conducting bracket 11. is supported by one of the magnetic coils 2, and is provided with an overhanging end 12 which contains as to regulate the'distance between the outer contactend 14 of the vibrating end 15 ofthe' conducting bracket 6. A conducting arm 16 is carried by a spring-arm 17," which is insulated from thecaslng by means of an insulating block 18. This conducting arm 16 carries an'adju'st- 1 ing screw 19 which forms'a contact between a the conducting arm 16 and the bracket 11;

for conducting the electric current through 4 the adjusting screw 13 to the e onducting arm 16. course,-it should be understood the vibrating end 15 is made of sprin metal to facilitate the ready vibration oft e end-- 15. Of course, it should be understood that the entire arm 7 is of suchmaterial as to be readily acted upon by magnetism, although the same is insulated from the arm' 6. 'The adjusting screw 19 passes through an enlarged aperture 20 formed in the casing 1 for preventing the adjusting screw 19 from. short circuiting upon the .casing'l. .The' spring arm 17 is electrically connected to a battery 21, by means of a lead wire 22, and the bracket 4 is electrical] battery 21 by means of a ead wire 23.

A push button 24 may be employed in the electric circuit as indicated in Fig: 2- for connected to the opening and closing the circuit or causingthe perforating arm 7 to operate. It will be seen that when the circuit is closed, the current will pass from the battery 21v up through the lead wire 23, through the arm 6, through the adjusting screw 13 and back to the battery by means of the conducting arm 16, spring arm 17, and lead wire 22. Of course, the elect'ro-magnets 2 will be'energized so as to cause the arm 7 to vibrate in the usualv manner which is the case with a vibrating mechanism.

From the foregoin description, it will be seen that a very e cient and durable device has been produced which may allow the perforation of a sheet of paper, and is especially adapted for use in connection Y 60 adjusting screw 13. This adjusting screw 13 may be so adjusted upon the bracket 11";

required for facilitating the easy tearing thereof, especially when placing borders upon a wall.

It will be further seen from the forego--' iing description that a very simple and efli- 'cient device has been dproduced Which may' be conveniently carrie fro-m place to. place,

and which may be easily handled so as to cause the perforating point 9 to effectively operate upon the paper to be cut. It should be understood that by having the contact formed between theconducting' member 1.6 and the bracket 11 by means of the adjusting screw 19 the electro-lnagnets may be removed from the casing 1 without removing the conducting member 16.

v 'What is claimed is A paper perforating device of the class described comprising a casing, a plurality of e1ectro-magnets carried by said casing, an arm carried by one of said electro-magnets, a conducting member carried by said arm and provided with a forwardly extending spring vibrating end, "a perforating arm carried by saidconducting member, a 25 bracket carried by one of said electro-mag-- WILLIAM J. KOSTER.

I lvitnesses: V

F; N. ZCUR'ION, I. L. Horwoon. 

